From the correlation between Ly\(\) /H\(\)  and the UV/optical flux ratio (see Figure 1 and Section 3.4 above) [1]} argued empirically that the velocity-integrated Ly\(\) /H\(\)  flux ratio is close to a Case B value of \(\approx 35\) . [2]} found that the Ly\(\) /H\(\)  ratio is higher in the high-velocity wings of the lines. [1]} proposed that the Lyman \(\)  enhancement at high velocities is due to continuum ﬂuorescence in the Lyman lines (so-called “Case C" conditions – see [4]}, [5]}, and [6]}). Because of this enhancement of Lyman \(\)  in the high-velocity wings, the velocity-integrated intrinsic Ly\(\) /H\(\)  ratio could be somewhat greater than a Case B value, but for NGC 5548 we will assume a Case B Ly\(\) /H\(\)  ratio of 35.
